£50 will be the most they pay unless you can make a case for why the coach wouldn't work for you. So long as you don't have to wait too long (and you can use the NEx App to see where your coach is in real time) then it's just as far as a taxi, gets nearer to the airport buidings, has plenty of legroom and fairly comfortable in my experience. And you don't have to listen to the driver's opinions on [random contentious but tedious topic goes here].